Flat wire twist head mold and method of inserting flat wire into twist head mold
By adopting a nested cylinder and guide structure in the flat wire twisting die, the problem of insufficient precision in the flat wire insertion position is solved, enabling smooth insertion and efficient production of flat wires.
Patent Information
- Application Number
- CN202310205109.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-06
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2043-03-06
AI Technical Summary
The existing flat wire motor stator end torsion head mold has poor positional accuracy during the torsion process, which makes the flat wire insertion more likely to fail, especially due to the small chamfer and narrow tolerance range.
Design a flat wire twisting head mold, which adopts multiple nested cylinders with overlapping center lines, and sets guide bodies along the radial and circumferential directions, including circumferential guide bodies and radial guide bodies, to expand the position range of the flat wire entering the twisting groove. The flat wire is guided into the twisting groove through the guide surface to ensure smooth insertion of the flat wire.
It significantly improves the success rate of flat wire entering the torsion groove, expands the tolerance range, reduces the risk of flat wire insertion failure, and improves production efficiency.
Smart Images
Figure CN116345806B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of flat wire motor manufacturing technology, and in particular to a flat wire twisting head mold and a method for inserting flat wire into the twisting head mold. Background Technology
[0002] Twisting the layers of flat wire at the stator end of a flat wire motor is a crucial step in its manufacturing process. Twisting involves alternatingly twisting and deforming the flat wires inserted into a twisting mold, starting with the outer layers and progressing to the inner layers. Typically, the outer layer flat wire is longer than the inner layer. During twisting, the Z-axis moves continuously at a constant speed, and the multiple twisting cylinders move sequentially from the outside in, maintaining a certain synchronization with the Z-axis. The number of twisting cylinders corresponds to the number of flat wire layers. The outer layer flat wire is longer than the inner layer because the total length of the flat wire remains constant during twisting. The ends of the flat wires move during twisting, and the radius of the outer layer's twisted arc is larger than that of the inner layer, resulting in a greater movement distance for the outer layer's ends than for the inner layer. To ensure the flat wire ends are flush after twisting, the outer layer's length must be greater than the inner layer's.
[0003] Before twisting the flat wire, end shaping and flaring processes are required before inserting the flat wire into the twisting groove of the twisting mold. After flaring, the positional accuracy of each layer of flat wire is poor, and it cannot be guaranteed that all flat wires are within the allowable tolerance range. If even one flat wire in a multi-layer flat wire system fails to enter the drum, the entire system is scrapped. To improve the success rate of flat wire insertion, existing twisting molds incorporate a chamfer 4 at the entrance of the twisting groove 2 in the drum body 1, using the chamfer 4 to guide the flat wire into the twisting groove 2. Figure 1 This is a schematic diagram of the existing torsion head mold structure. Figure 2 This is a magnified view of the inlet of the torsion groove. Due to the wall thickness of each layer, the existing chamfer is quite small, with a width of approximately 1 mm. Therefore, the allowable tolerance range is still very small, and there is a significant possibility of failure. Summary of the Invention
[0004] To overcome the shortcomings of the prior art, the present invention provides a flat wire twisting mold and a method for inserting flat wire into the twisting mold. The twisting mold expands the allowable position range when the flat wire enters the twisting groove, thereby improving the success rate of the flat wire entering the twisting groove.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a flat wire twisting head mold, comprising multiple cylindrical bodies with overlapping center lines arranged in a nested manner, with odd-numbered layers and even-numbered layers of cylindrical bodies arranged alternately from the outside to the inside along the radial direction of the cylindrical bodies, and multiple twisting grooves spaced apart along the circumference of one side of the cylindrical body, wherein the twisting grooves on the even-numbered layers of cylindrical bodies and the twisting grooves on one side of the odd-numbered layers of cylindrical bodies can rotate with the cylindrical bodies to a relatively connected state; at least one guide body is provided on the end face of at least one of the cylindrical bodies, and located on the periphery of the twisting groove, wherein the guide body has a guide surface on the side opposite to the twisting groove.
[0006] The flat wire is a flat copper wire. The twisting mold can have an odd or even number of nested cylinders. Common twisting molds have six or eight nested cylinders. Depending on actual production needs, it can also be configured with two, four, seven, nine, ten, or twelve nested cylinders. Preferably, it includes 2N cylinders with overlapping center lines arranged in a nested configuration, where N is a positive integer. The twisting grooves on the odd-numbered cylinder layers and the twisting grooves on the even-numbered cylinder layers inside them can rotate with the cylinders to a relatively connected state. Guide bodies can be arbitrarily selected for the cylinders; preferably, guide bodies are provided along the radial direction of the cylinders, at least on all cylinders except the inner layer.
[0007] By providing at least one guide body on the end face of the cylinder and on the periphery of the torsion groove, when the flat wire is located outside the torsion groove and opposite to the guide surface of the guide body, the flat wire can be guided into the torsion groove through the guide surface. This also includes the space of the guide surface outside the torsion groove within the allowable range of the flat wire position, greatly increasing the allowable tolerance range and thus improving the success rate of the flat wire entering the torsion groove.
[0008] Furthermore, the guide body includes a circumferential guide body and a radial guide body. The circumferential guide body and the torsion groove of the cylinder body are arranged along the circumference of the cylinder body, and the radial guide body and the corresponding torsion groove of the cylinder body are arranged along the radial direction of the cylinder body.
[0009] At least on one of the outermost and innermost first cylinders, the circumference of the torsion groove has at least one circumferential guide or a radial guide, or at least one circumferential guide and a radial guide may be present on the circumference of the torsion groove.
[0010] Preferably, on the first cylinder, two circumferential guides and one radial guide are simultaneously provided outside each torsion groove to maximize the allowable range of the flat wire position from different directions.
[0011] Furthermore, when there are more than two cylinders, there are multiple intermediate cylinders between the two first cylinders, and at least one circumferential guide is provided on the periphery of the torsion groove of the intermediate cylinder, so that the flat wire located in the intermediate layer can also obtain a larger position range.
[0012] Furthermore, each of the cylindrical bodies is provided with a circumferential guide body, which is arranged alternately with the torsion groove, so that the circumferential guide body is provided on both sides of each torsion groove, thereby maximizing the expansion of the position range in the length direction of the torsion groove.
[0013] Furthermore, on the first cylinder, each of the torsion grooves is provided with a radial guide body to ensure that each torsion groove can expand its position range in the width direction.
[0014] Furthermore, the guide surface is a guide curved surface or a guide inclined surface, offering multiple processing possibilities and facilitating manufacturing. Specifically, the circumferential guide body has a guide curved surface on the side opposite to the torsion groove of its cylindrical body, and the radial guide body has a guide inclined surface on the side opposite to the torsion groove. Providing a guide curved surface on the side of the circumferential guide body opposite to the torsion groove allows it to be matched with the torsion angle of the flat wire, thereby avoiding interference.
[0015] Furthermore, on at least one circumferential guide body of the intermediate cylinder, a guide ramp is provided on at least one outward-facing side along the radial direction of the cylinder. In practical use, the cylinder can be rotated so that the guide ramp is opposite to its outer torsion groove. The guide ramp can serve as a guide for the outer torsion groove in the radial direction, allowing the flat wire located in the intermediate layer to expand its position range in the width direction of the torsion groove.
[0016] Specifically, when there are an even number of cylinders, a guide slope can be provided on the circumferential guide body of the odd-numbered cylinders belonging to the middle cylinder, along the radial direction of the cylinder, facing outwards. When there are an odd number of cylinders, if the even-numbered cylinders and the odd-numbered cylinders on the outer side can form a connected double groove, a guide slope can be provided on the circumferential guide body of the odd-numbered cylinders on the inner side of the even-numbered cylinders, along the radial direction of the cylinder, facing outwards; if the even-numbered cylinders and the odd-numbered cylinders on the inner side can form a connected double groove, a guide slope can be provided on the circumferential guide body of the even-numbered cylinders belonging to the middle cylinder, along the radial direction of the cylinder, facing outwards.
[0017] In addition to setting a guide slope on the outward side of the circumferential guide body and using the guide slope as a guide for the outer layer torsion groove in the radial direction, a guide slope can also be set on the inward side of the circumferential guide body of the intermediate cylinder and used as a guide for the inner layer torsion groove in the radial direction, so that the flat line located in the intermediate layer can also be maximized in the width direction of the torsion groove.
[0018] For the first cylinder located in the outermost and innermost layers, circumferential and radial guides are directly provided around each torsion groove, enclosing the torsion groove and thus expanding the range of flat wire positions in both the length and width directions of the torsion groove. For the intermediate cylinder, circumferential guides are directly provided around each torsion groove, expanding the range of flat wire positions in the intermediate layer along the length of the torsion groove. By rotating the intermediate cylinder, its circumferential guides can be used as radial guides for either the inner or outer torsion groove, thereby expanding the range of flat wire positions in the intermediate layer along the width of the torsion groove.
[0019] By setting circumferential and radial guide bodies on the end face of the cylinder, the remaining space on the end face is fully utilized and increased to the allowable range of the flat line position, thereby expanding the tolerance range and improving the success rate of cylinder entry.
[0020] Furthermore, a chamfer is provided at the entrance of the torsion groove. The chamfer can be machined into a guide surface to form multiple guides.
[0021] Secondly, a method for inserting a flat wire into a twisting die using the aforementioned flat wire twisting die includes the following steps:
[0022] Along the radial direction of the cylinder, the flat wires gradually enter the twisting grooves from the outside to the inside, with the length decreasing. Before entering the even-numbered cylinder layers, the twisting grooves of the even-numbered cylinder layers on one side are aligned with those of the odd-numbered cylinder layers on the other side, forming a connected double groove. The flat wires are then inserted into the double grooves.
[0023] When there are more than two cylinders, before inserting the flat wire into the double groove, the guide body of the inner cylinder adjacent to the double groove is positioned opposite the double groove, serving as a guide for the torsion groove located in the inner layer of the double groove in the radial direction.
[0024] In the circumferential direction of the cylinder, by setting circumferential guides, the position range of the flat wire is expanded in the length direction of the torsion groove. In the radial direction of the cylinder, by utilizing the fact that the length of the outer flat wire is greater than that of the inner flat wire, the outer flat wire is inserted into the torsion groove first. Furthermore, by the relative rotation of the cylinder, the guides located inside or outside the torsion groove in the radial direction can be used as guides in the radial direction, thereby expanding the position range of the flat wire in the width direction of the torsion groove.
[0025] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:
[0026] 1. By setting at least one guide body on the end face of the cylinder and on the periphery of the torsion groove, when the flat wire is located outside the torsion groove and opposite to the guide surface of the guide body, the flat wire can be guided into the torsion groove through the guide surface. The space where the guide surface outside the torsion groove is located is also included in the allowable range of the flat wire position, which greatly increases the allowable tolerance range and thus improves the success rate of the flat wire entering the torsion groove.
[0027] 2. In the circumferential direction of the cylinder, by setting circumferential guides, the position range of the flat wire is expanded in the length direction of the torsion groove, and the side of the circumferential guides is set as guide curved surfaces to avoid interference during the torsion of the flat wire. In the radial direction of the cylinder, by utilizing the fact that the length of the outer flat wire is greater than that of the inner flat wire, the outer flat wire is inserted into the torsion groove first, and by the relative rotation of the cylinder, the guides located inside or outside the torsion groove in the radial direction can be used as guides in the radial direction, expanding the position range of the flat wire in the width direction of the torsion groove.
[0028] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of an existing torsion head mold structure in the background art of this invention;
[0031] Figure 2 yes Figure 1 Enlarged view of a portion of the inlet of the torsion groove;
[0032] Figure 3 This is a schematic diagram of the flat wire twisting head mold in Embodiment 1 of the present invention;
[0033] Figure 4 This is a top view of the flat wire twisting head mold in Embodiment 1 of the present invention;
[0034] Figure 5 This is a schematic diagram of the outermost first cylinder in Embodiment 1 of the present invention;
[0035] Figure 6 yes Figure 5 Enlarged view of a portion of point A in the middle;
[0036] Figure 7 This is a schematic diagram of the second cylinder of the fourth layer in Embodiment 1 of the present invention;
[0037] Figure 8 yes Figure 7 Enlarged view of a section at point B in the middle;
[0038] Figure 9 This is a schematic diagram of the third cylinder of the third layer in Embodiment 1 of the present invention;
[0039] Figure 10 yes Figure 9 Enlarged view of a section at point C;
[0040] Figure 11 This is a schematic diagram of the innermost first cylinder in Embodiment 1 of the present invention;
[0041] Figure 12 yes Figure 12 Enlarged view of a section at point D;
[0042] Figure 13 This is a schematic diagram of the torsion groove state when the flat wire enters the first and second layers of the cylinder in Embodiment 1 of the present invention;
[0043] Figure 14 This is a schematic diagram of the torsion groove state when the flat wire enters the third and fourth layers of the cylinder in Embodiment 1 of the present invention;
[0044] Figure 15 This is a schematic diagram of the torsion groove state when the flat wire enters the fifth and sixth layers of the cylinder in Embodiment 1 of the present invention.
[0045] The reference numerals in the above figures are as follows: 1. Cylinder; 11. First cylinder; 12. Second cylinder; 13. Third cylinder; 2. Torsional groove; 21. Double groove; 3. Guide body; 31. Circumferential guide body; 311. Guide surface; 32. Radial guide body; 321. Guide slope; 4. Chamfer. Detailed Implementation
[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0047] Example 1: See Figures 3-15 As shown, a flat wire twisting die includes six nested cylindrical bodies 1 with their center lines overlapping. Along the radial direction of the cylindrical bodies 1, odd-numbered and even-numbered layers of cylindrical bodies are arranged alternately from the outside to the inside. Multiple twisting grooves 2 are provided at equal intervals along the circumference of one side of each cylindrical body 1. The twisting grooves 2 on the odd-numbered layers of cylindrical bodies and the twisting grooves 2 on the even-numbered layers of cylindrical bodies inside them can rotate with the cylindrical body 1 to a relatively connected state, forming a double-line groove 21.
[0048] A guide body 3 is provided on the end face of the cylinder 1 and around the torsion groove 2. The guide body 3 is a protrusion formed on the end face, and a guide surface is provided around the protrusion to guide the flat wire into the torsion groove 2. The guide body includes a circumferential guide body 31 and a radial guide body 32. The circumferential guide body 31 and its corresponding torsion groove 2 of the cylinder 1 are arranged circumferentially along the cylinder 1, and the radial guide body 32 and its corresponding torsion groove 2 of the cylinder are arranged radially along the cylinder 1.
[0049] On each of the cylindrical bodies 1, the circumferential guides 31 and the torsion grooves 2 are arranged alternately along the circumferential direction of the cylindrical body, forming a circumferential guide 31 on both sides of each torsion groove 2, thereby maximizing the allowable range of the flat line position of each torsion groove 2 in the length direction. The side of the circumferential guide 31 opposite to the torsion groove 2 of the cylindrical body in which it is located is provided with a guide surface 311.
[0050] See Figure 5 , 11 As shown, on the outermost (first layer) and innermost (sixth layer) first cylindrical body 11, each of the torsion grooves 2 is provided with a radial guide body 32. Multiple radial guide bodies 32 are arranged at equal intervals along the circumference of the first cylindrical body 11 on its end face. The side of each radial guide body 32 opposite to the torsion groove 2 is provided with a guide slope 321, see [reference]. Figure 6 , 12 As shown.
[0051] The second, third, fourth, and fifth layers of cylinders between the two first cylinders 11 are designated as intermediate cylinders. The second and fourth layers are designated as the second cylinder 12, and the third and fifth layers as the third cylinder 13. (See also...) Figure 9 , 10 As shown, a guide slope 321 is provided on the circumferential guide body 31 of the third cylinder 13, facing outward along the radial direction of the cylinder. In use, the third cylinder 13 can be rotated so that its circumferential guide body 31 is opposite to the torsion groove 2 of the second cylinder 12, so that the guide slope 321 of the circumferential guide body 31 of the third cylinder 13 serves as a guide for the torsion groove 2 of the second cylinder 12 in the radial direction.
[0052] A chamfer 4 is also provided at the entrance of the torsion groove 2. The chamfer 4 can be processed into a guide surface 311 to form multiple guides.
[0053] A method for inserting a flat wire into a twisting die using the above-mentioned flat wire twisting die includes the following steps:
[0054] Along the radial direction of the cylinder, from the outside to the inside, align the torsion grooves 2 of the first and second cylinder layers, forming a connected double-line groove 21. With the double-line groove 21 in place, rotate the third cylinder layer so that the circumferential guide 31 on the third cylinder layer aligns with the torsion groove 2 on the second cylinder layer. Specifically, align the guide slope 321 of the circumferential guide 31 with the torsion groove 2 of the second cylinder layer, serving as a guide for the torsion groove 2 of the second cylinder layer in the radial direction. Then, insert the flat wire, which is opposite to the torsion grooves 2 of the first and second cylinder layers, into the torsion groove 2. (See [reference]). Figure 13 As shown.
[0055] After inserting the flat wires into the first and second layers of the cylinder, rotate the third layer so that the torsion groove 2 of the third layer is opposite to the torsion grooves 2 of the second and fourth layers. The torsion grooves 2 of the third and fourth layers form a connected double groove 21. With the double groove 21 in place, rotate the fifth layer so that the circumferential guide 31 on the fifth layer is opposite to the torsion groove 2 of the fourth layer, specifically, the guide slope 321 of the circumferential guide 31 is opposite to the torsion groove 2 of the fourth layer, serving as a guide for the torsion groove 2 of the fourth layer in the radial direction. Then, insert the flat wires opposite to the torsion grooves 2 of the third and fourth layers into the torsion grooves 2, see [reference]. Figure 14 As shown.
[0056] After inserting the flat wires into the third and fourth layers of the cylindrical body, rotate the fifth layer of the cylindrical body so that the torsion groove 2 of the fifth layer is opposite to the torsion grooves 2 of the fourth and sixth layers. The torsion grooves 2 of the fifth and sixth layers form a connected double-line groove 21. Insert the flat wires opposite to the torsion grooves 2 of the fifth and sixth layers into the torsion grooves 2, see [reference]. Figure 15 As shown.
[0057] In the process of creating the flat wire twist groove 2, a circumferential guide body 31 is provided in the circumferential direction of the cylinder to expand the flat wire position range in the length direction of the twist groove 2. In the radial direction of the cylinder, the outermost and innermost cylinders are equipped with radial guide bodies 32 to expand the flat wire position range in the width direction of the twist groove 2. In the middle cylinder, the outer flat wire is inserted into the twist groove 2 first because its length is greater than that of the inner flat wire. Through the relative rotation of the cylinders, the guide body located inside the twist groove 2 in the radial direction can be used as a guide in the radial direction to expand the flat wire position range in the width direction of the twist groove 2. By expanding the tolerance range for flat wire insertion around the entire circumference of the twist groove 2, the success rate of the flat wire twist groove 2 is improved.
[0058] Example 2: A flat wire twisting mold, which is similar to the flat wire twisting mold in Example 1. The difference is that the flat wire twisting mold includes two first cylinders 11 whose center lines coincide and are nested together, and there is no intermediate cylinder inside.
[0059] On the opposite sides of the two first cylindrical bodies 11, a plurality of torsion grooves 2 are provided at equal intervals along their circumference. On the end face of the first cylindrical body 11, and located around the torsion grooves 2, two circumferential guides 31 and one radial guide 32 are provided. The circumferential guides 31 and their corresponding torsion grooves 2 in the cylindrical body 1 are arranged circumferentially. The radial guides 32 and their corresponding torsion grooves 2 in the cylindrical body 1 are arranged radially. The sides of the circumferential guides 31 and the radial guides 32 opposite to the torsion grooves 2 are provided with guide surfaces.
[0060] The circumferential guide body 31 has a guide surface 311 on the side opposite to the torsion groove 2 of the cylinder it is in, that is, the circumferential guide body 31 has two guide surfaces 311 arranged in opposite directions. The circumferential guide surface 311 can avoid interference with the torsion of the flat wire. The radial guide body 32 has a guide slope 321 on the side opposite to the torsion groove 2. The guide slope 321 is easy to process.
[0061] A chamfer 4 is also provided at the entrance of the torsion groove 2. The chamfer 4 can be processed into a guide surface 311 to form multiple guides.
[0062] By utilizing the remaining space on the end face after the inlet of the torsion groove 2, a guide body is installed, making full use of the remaining space on the end face and increasing it to within the allowable range of the flat line position. Simultaneously, a circumferential guide body 31 and a radial guide body 32 are installed, expanding the tolerance range in both the length and width directions of the torsion groove 2 and improving the success rate of cylinder entry.
[0063] A method for inserting a flat wire into a twisting die using the above-mentioned flat wire twisting die includes the following steps:
[0064] The two first cylinders 11 are rotated until the torsion grooves 2 on them are connected to each other to form a double groove 21. Then, the flat wire opposite to the torsion groove 2 is inserted into the first cylinder 11. During this insertion process, the radial guide body 32 and the circumferential guide body 31 around the double groove 21 provide guidance to improve the success rate of insertion into the cylinder.
[0065] Example 3: A flat wire twisting mold. This example is similar to the flat wire twisting mold in Example 1, except that a guide slope 321 is provided on the circumferential guide body 31 of the second cylinder 12 along the radial direction of the cylinder and facing inward.
[0066] A method for inserting a flat wire into a twisting mold using the aforementioned flat wire twisting mold is similar to the steps in Embodiment 1, except that the circumferential guide 31 of the second cylinder 12 is used as a guide for the radial direction of the twisting groove 2 of the third cylinder 13. Specifically, it includes the following steps:
[0067] Along the radial direction of the cylinder, from the outside to the inside, the torsion grooves 2 of the first and second cylinder layers are aligned, forming a connected double groove 21. With the double groove 21 in place, the third cylinder layer is rotated so that the circumferential guide 31 on the third cylinder layer aligns with the torsion groove 2 on the second cylinder layer. Specifically, the guide slope 321 of the circumferential guide 31 aligns with the torsion groove 2 of the second cylinder layer, serving as a guide for the torsion groove 2 of the second cylinder layer in the radial direction. Then, a flat wire, aligned with the torsion grooves 2 of the first and second cylinder layers, is inserted into the torsion groove 2.
[0068] After inserting the flat wires into the first and second layers of the cylinder, the guide slope 321 of the circumferential guide 31 of the second layer of the cylinder is used as a guide for the torsion groove 2 of the third layer of the cylinder in the radial direction, and the torsion groove 2 of the third layer of the cylinder and the torsion groove 2 of the fourth layer of the cylinder form a connected double groove 21. With the double groove 21 in the state, the fifth layer of the cylinder is rotated so that the circumferential guide 31 on the fifth layer of the cylinder is aligned with the torsion groove 2 of the fourth layer of the cylinder, that is, the guide slope 321 of the circumferential guide 31 is aligned with the torsion groove 2 of the fourth layer of the cylinder, serving as a guide for the torsion groove 2 of the fourth layer of the cylinder in the radial direction. Then, the flat wires that are aligned with the torsion grooves 2 of the third and fourth layers of the cylinder are inserted into the torsion groove 2.
[0069] After inserting the flat wires into the third and fourth cylindrical bodies, the guide slope 321 of the circumferential guide body 31 of the fourth cylindrical body is used as a guide for the torsion groove 2 of the third cylindrical body in the radial direction, and the torsion groove 2 of the fifth and sixth cylindrical bodies forms a connected double-line groove 21. The flat wires opposite to the torsion grooves 2 of the fifth and sixth cylindrical bodies are inserted into the torsion grooves 2.
[0070] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A flat wire twisting head mold, characterized in that: The system comprises multiple nested cylinders with overlapping centerlines. Along the radial direction of the cylinders, odd-numbered and even-numbered cylinder layers are alternately arranged from the outside to the inside. Multiple torsion grooves are spaced apart circumferentially on one side of each cylinder. The torsion grooves on the even-numbered cylinder layers and the torsion grooves on one side of the odd-numbered cylinder layers can rotate with the cylinder to reach a relatively connected state. At least one circumferential guide and one radial guide are provided on the end face of at least one cylinder, located around the torsion groove. The circumferential guide and its corresponding torsion groove are arranged circumferentially along the cylinder, while the radial guide and its corresponding torsion groove are arranged radially along the cylinder. Both the circumferential and radial guides have a guide surface on the side opposite to the torsion groove. When there are more than two cylinders, there are a plurality of intermediate cylinders between the two first cylinders, and at least one circumferential guide is provided on the periphery of the torsion groove of the intermediate cylinder; on the circumferential guide of at least one intermediate cylinder, a guide slope is provided on at least one side facing outward along the radial direction of the cylinder, and the guide slope serves as a guide for the torsion groove on the outer side of the intermediate cylinder in the radial direction. A chamfer is provided at the entrance of the torsion groove.
2. The flat wire twisting head mold according to claim 1, characterized in that: On one of the first cylinders in the outermost and innermost layers, the circumference of the torsion groove has at least one circumferential guide and one radial guide.
3. The flat wire twisting die according to claim 1, characterized in that, Each of the cylindrical bodies is provided with a circumferential guide body, and the circumferential guide body and the torsion groove are arranged alternately.
4. The flat wire twisting die according to claim 1, characterized in that, On the first cylinder, each of the torsion grooves is provided with a corresponding radial guide.
5. The flat wire twisting die according to claim 1, characterized in that, The guide surface is a guide curved surface or a guide inclined surface.
6. The flat wire twisting die according to claim 1, characterized in that, The circumferential guide body has a guide surface on the side opposite to the torsion groove of the cylinder it is in, and the radial guide body has a guide slope on the side opposite to the torsion groove.
7. A method for inserting a flat wire into a twisting die using the flat wire twisting die according to any one of claims 1 to 6, characterized in that, Includes the following steps: Along the radial direction of the cylinder, the flat wires gradually enter the twisting grooves from the outside to the inside, with the length decreasing. Before entering the even-numbered cylinder layers, the twisting grooves of the even-numbered cylinder layers on one side are aligned with those of the odd-numbered cylinder layers on the other side, forming a connected double groove. The flat wires are then inserted into the double grooves. When there are more than two cylinders, before inserting the flat wire into the double groove, the circumferential guide of the inner cylinder adjacent to the double groove is positioned opposite the double groove and used as a guide for the torsion groove located in the inner layer of the double groove in the radial direction.